Security concerns continue to chase Lenovo as its official website falls victim to a cyber attack, possibly a backlash of Superfish adware.

Lenovo's official website has suffered a cyberattack days after the company asserted preinstalling adware, known as Superfish, on some of its PCs. The website displayed message that site was under maintenance. Hacking group Lizard Squad has claimed the responsibility of the hack attack.

Confirming the security breach, Lenovo told WSJ: "Unfortunately, Lenovo has been the victim of a cyber attack. One effect of this attack was to redirect traffic from the Lenovo website. We are also actively investigating other aspects of the attack. We are responding and have already restored certain functionality to our public facing website."

Hackers group, Lizard Squad, said they were responsible for the hack attack. It may be recalled the same group had previously conducted attacks on PlayStation Networks and other games last year. It recently conducted attacks on Facebook and Instagram.

Lenovo had faced wide criticism for preinstalling adware on some of its PCs. The adware displayed ads into search engine results without user's permission and has the potential to access and even take control of SSL/TLS connections to website.

"Due to some issues (browser pop-up behavior, for example) with the Superfish Visual Discovery browser add-on, we have temporarily removed Superfish from our consumer systems until such time as Superfish is able to provide a software build that addresses these issues. As for units already in market, we have requested that Superfish auto-update a fix that addresses these issues," Lenovo's Mark Hopkins wrote on a Lenovo forum.

Digit caters to the largest community of tech buyers, users and enthusiasts in India. The all new Digit.in continues the legacy of Thinkdigit.com as one of the largest portals in India committed to technology users and buyers. Digit is also one of the most trusted names when it comes to technology reviews and buying advice and is home to the Digit Test Lab, India's most proficient center for testing and reviewing technology products.